Commit Graph

5325 Commits

Author SHA1 Message Date
Benoit Gschwind
390af6d7ee main: rename wayland_backend_config_add_new_output function
Rename wayland_backend_config_add_new_output to
weston_wayland_backend_config_add_new_output to follow the legacy naming
scheme.

Signed-off-by: Benoit Gschwind <gschwind@gnu-log.net>
Reviewed-by: Quentin Glidic <sardemff7+git@sardemff7.net>
[Pekka: rebased]
Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
2016-05-11 13:42:50 +03:00
Benoit Gschwind
55a2288e40 main: replace and remove new_config in load_wayland_backend_config
Remove the unseless intermediate variable new_config in the function
load_wayland_backend_config, replacing it by the renamed parameter
'config'.

Signed-off-by: Benoit Gschwind <gschwind@gnu-log.net>
Reviewed-by: Quentin Glidic <sardemff7+git@sardemff7.net>
[Pekka: Squashed in "compositor-wayland: rename out_config arg of load_wayland_backend_config".]
Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
2016-05-11 13:42:39 +03:00
Benoit Gschwind
6c1cd2fd05 main: rename load_wayland_backend_config arg "config" to wc
Rename the load_wayland_backend_config arg "config" to use this name for
another variable in the following patch. It also follow the legacy
naming scheme.

Signed-off-by: Benoit Gschwind <gschwind@gnu-log.net>
Reviewed-by: Quentin Glidic <sardemff7+git@sardemff7.net>
Reviewed-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
2016-05-11 13:41:55 +03:00
Benoit Gschwind
3ff10da571 compositor-wayland: move configuration parsing to weston main.c
Move function load_wayland_backend_config,
wayland_backend_config_add_new_output, wayland_backend_config_release,
weston_wayland_output_config_init from compositor-wayland.c to main.c.
Not a single character is changed in those functions.

Create a glue function load_wayland_backend to use moved functions and
following the new load_*_backend style.

Signed-off-by: Benoit Gschwind <gschwind@gnu-log.net>
Acked-by: Quentin Glidic <sardemff7+git@sardemff7.net>
[Pekka: removed left-over entry from load_backend().]
Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
2016-05-11 12:26:50 +03:00
Benoit Gschwind
e091b45b60 compositor-wayland: add versionning to config structure
The patch use temporary code that prepare the patch:
"compositor-wayland: move configuration parsing to weston main.c"

Signed-off-by: Benoit Gschwind <gschwind@gnu-log.net>
Reviewed-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
Reviewed-by: Quentin Glidic <sardemff7+git@sardemff7.net>
2016-05-11 12:26:08 +03:00
Benoit Gschwind
5dfce19c89 compositor-wayland: rename misleading output arg of weston_wayland_output_config_init
Rename the misleading output argument to output_config in the
weston_wayland_output_config_init function.

Signed-off-by: Benoit Gschwind <gschwind@gnu-log.net>
Reviewed-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
Reviewed-by: Quentin Glidic <sardemff7+git@sardemff7.net>
2016-05-11 12:26:00 +03:00
Benoit Gschwind
37c6a1f275 compositor-wayland: rename wayland_output_init_from_config
Rename wayland_output_init_from_config to weston_wayland_output_config_init
to prepare the following patch :
"compositor-wayland: move configuration parsing to weston"

Signed-off-by: Benoit Gschwind <gschwind@gnu-log.net>
Reviewed-by: Quentin Glidic <sardemff7+git@sardemff7.net>
[Pekka: drop a useless comment]
Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
2016-05-11 12:25:51 +03:00
Benoit Gschwind
676841d617 compositor-wayland: fix spacing and lines wraping
Signed-off-by: Benoit Gschwind <gschwind@gnu-log.net>
[Pekka: squashed with "compositor-wayland: fix too long lines".]
Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
Reviewed-by: Quentin Glidic <sardemff7+git@sardemff7.net>
2016-05-11 12:24:57 +03:00
Giulio Camuffo
1c0e40d9a2 drm: port the drm backend to the new init api
Preparing for libweston and for the separation of the code base into
libweston vs. weston the compositor, we must remove all uses
weston_config structures from the backends. We have decided that all
option and config input happens in the compositor (main.c), and
configuration is passed in for the backends as structs.

Most other backends have already converted, and this patch converts the
DRM-backend to the libweston-style init API.

The libweston-style init API includes a header for each backend (here
compositor-drm.h) defining the configuration interface. The compositor
(main.c) prepares a configuration struct to be passed through libweston
core to the backend during initialization.

A complication with the DRM-backend is that outputs can be hotplugged,
and their configuration needs to be fetched from the compositor
(main.c). For this, the config struct contains a callback member. The
output configuration API is subject to change later, this is just a
temporary API to get libweston forward.

As weston_compositor's user_data was not previously used for anything,
and the output configuration callback needs data, the user_data is set
to the 'config' pointer. This pointer is only used in
drm_configure_output() in main.c.

[Bryce: lots of stuff and rebasing]
Signed-off-by: Bryce Harrington <bryce@osg.samsung.com>
Reviewed-by: Quentin Glidic <sardemff7+git@sardemff7.net>
Acked-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
Tested-by: Benoit Gschwind <gschwind@gnu-log.net>
[Pekka: write commit message]
[Pekka: squash in "drm: Don't hang onto the backend config object
post-backend_init" from Bryce Harrington]
[Pekka: drop the compositor.h hunk]
[Pekka: do not #include inside extern "C"]
[Pekka: remove incorrect comment about weston_drm_backend_config
ownership.]
Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
2016-05-10 15:23:03 +03:00
Pekka Paalanen
59987fa172 compositor: refactor into convert_size_by_transform_scale()
There were two copies of code applying transform and scale to size.
Refactor the code to use just one copy in a new function.

Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
Reviewed-by: Bryce Harrington <bryce@osg.samsung.com>
2016-05-06 14:38:09 +03:00
Pekka Paalanen
04baea58fe compositor: constify weston_surface_build_buffer_matrix()
Makes it easier to see that it does not change weston_surface state
implicitly.

Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
Reviewed-by: Bryce Harrington <bryce@osg.samsung.com>
2016-05-06 14:35:28 +03:00
Bryce Harrington
2f783018ff releasing: Correct documentation for script name
Signed-off-by: Bryce Harrington <bryce@osg.samsung.com>
2016-05-04 14:58:50 -07:00
Benoit Gschwind
639322a447 compositor-wayland: put configuration structure in separate header
Signed-off-by: Benoit Gschwind <gschwind@gnu-log.net>
[Pekka: moved #include out of extern "C".]
Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
2016-05-04 15:40:56 +03:00
Benoit Gschwind
cd63b3ea51 compositor-wayland: split backend_init
Extract configuration parsing from init_backend function. The new
init_backend start by generating the configuration structure from
configuration file with separated function and then use this structure
to load the backend.

Signed-off-by: Benoit Gschwind <gschwind@gnu-log.net>
[Pekka: rebased]
Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
2016-05-04 15:40:56 +03:00
Benoit Gschwind
830b7882f1 compositor-wayland: split wayland_output_create_for_config
The splitting intend to separate configuration parsing from output
setup.

Introduces struct weston_wayland_backend_output_config.

Signed-off-by: Benoit Gschwind <gschwind@gnu-log.net>
[Pekka: squashed "wayland-backend: define output configuration
structure" into this.]
[Pekka: fix fullscreen output scale back to 1.]
Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
2016-05-04 15:40:56 +03:00
Benoit Gschwind
244ff799fb compositor-wayland: move config parsing in create_cursor
Move configuration parsing from create_cursor to backend_init. Use newer
configuration structure to initialize the cursor in create_cursor.

Signed-off-by: Benoit Gschwind <gschwind@gnu-log.net>
Reviewed-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
2016-05-04 15:40:56 +03:00
Benoit Gschwind
3a49b51f8e compositor-wayland: use new config struture to create backend
Signed-off-by: Benoit Gschwind <gschwind@gnu-log.net>
Reviewed-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
2016-05-04 15:40:56 +03:00
Benoit Gschwind
079b626919 compositor-wayland: fix memory leak of display_name
Signed-off-by: Benoit Gschwind <gschwind@gnu-log.net>
Reviewed-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
2016-05-04 15:40:56 +03:00
Benoit Gschwind
37a6807905 compositor-wayland: create a basic config structure to use in new init API
Signed-off-by: Benoit Gschwind <gschwind@gnu-log.net>
Reviewed-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
2016-05-04 15:40:56 +03:00
Daniel Stone
d62004efca libinput: Remove unused static values
default_seat and default_seat_name are not used anywhere in this file.

Signed-off-by: Daniel Stone <daniels@collabora.com>
Reviewed-by: Jonas Ådahl <jadahl@gmail.com>
2016-05-04 17:16:39 +08:00
Quentin Glidic
63225cf252 weston.pc: Properly specify Requires.private
We include wayland-server.h, pixman.h and xkbcommon.h in compositor.h,
but they are not required for linking if the plugin doesn’t use them.

Signed-off-by: Quentin Glidic <sardemff7+git@sardemff7.net>
Reviewed-by: Bryce Harrington <bryce@osg.samsung.com>
Reviewed-by: Daniel Stone <daniels@collabora.com>
Signed-off-by: Daniel Stone <daniels@collabora.com>
2016-05-04 10:14:11 +01:00
Bryce Harrington
870b16466f configure.ac: bump to version 1.10.91 for the alpha release 2016-05-03 18:35:32 -07:00
Quentin Glidic
5c20195e7a compositor.h: Add shell_interface.get_output_work_area
This will allow plugins to be aware of e.g. panels, to avoid covering
them with other surfaces.

Signed-off-by: Quentin Glidic <sardemff7+git@sardemff7.net>
Reviewed-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
2016-05-03 15:45:24 +03:00
Bryce Harrington
aa258985e9 x11: Fix incorrect output counting logic
Signed-off-by: Bryce Harrington <bryce@osg.samsung.com>
2016-05-03 01:34:23 -07:00
Benoit Gschwind
e16acabf7a x11: port the x11 backend to the new init api
Use a "well" defined structure to configure x11-backend and move configuration
file parsing inside the weston compositor code.

Enforce destruction of all backend config objects after initialization.
Since the backend config struct versioning implies that there we expect
potential future descrepancy between main's definition of the config
object and the backend's, don't allow the backend to hang onto the
config object outside the initialization scope.

Signed-off-by: Bryce Harrington <bryce@osg.samsung.com>
Reviewed-by: Giulio Camuffo <giuliocamuffo@gmail.com>
Reviewed-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
Reviewed-by: Benoit Gschwind <gschwind@gnu-log.net>
Tested-by: Benoit Gschwind <gschwind@gnu-log.net>
2016-05-03 01:24:28 -07:00
Benoit Gschwind
2da6d0cf69 headless-backend: fix leak of transform configuration
Signed-off-by: Benoit Gschwind <gschwind@gnu-log.net>
Reviewed-by: Bryce Harrington <bryce@osg.samsung.com>
[Pekka: fixed the mispelling in subject]
Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
2016-05-02 12:00:25 +03:00
Yong Bakos
4c72e29f99 compositor: Hyphenate compound adjective surface-local
See https://lists.freedesktop.org/archives/wayland-devel/2016-April/028249.html.

Signed-off-by: Yong Bakos <ybakos@humanoriented.com>
Reviewed-by: Bryce Harrington <bryce@osg.samsung.com>
2016-04-29 16:33:14 -07:00
Yong Bakos
2aa6bd7c97 ivi-application: Hyphenate compound adjective surface-local
See https://lists.freedesktop.org/archives/wayland-devel/2016-April/028249.html.

Signed-off-by: Yong Bakos <ybakos@humanoriented.com>
Reviewed-by: Bryce Harrington <bryce@osg.samsung.com>
2016-04-29 16:33:11 -07:00
Yong Bakos
e069871da3 ivi-layout: Correct coordinate adjective grammar, misspellings
Hyphenate 'multi screen' coordinates, and correct misspellings and
grammar within changed lines.

See https://lists.freedesktop.org/archives/wayland-devel/2016-April/028249.html.

Signed-off-by: Yong Bakos <ybakos@humanoriented.com>
Reviewed-by: Bryce Harrington <bryce@osg.samsung.com>
2016-04-29 16:33:08 -07:00
Yong Bakos
3b2276101d fullscreen-shell: Use 'surface-local' to correct grammar
Correct the pluralization by simplifying with 'surface-local'.

See https://lists.freedesktop.org/archives/wayland-devel/2016-April/028249.html.

Signed-off-by: Yong Bakos <ybakos@humanoriented.com>
Reviewed-by: Bryce Harrington <bryce@osg.samsung.com>
2016-04-29 16:33:05 -07:00
Yong Bakos
bbb783a957 desktop-shell: Use 'surface-local' to correct grammar
Correct the pluralization by simplifying with 'surface-local'.

See https://lists.freedesktop.org/archives/wayland-devel/2016-April/028249.html.

Signed-off-by: Yong Bakos <ybakos@humanoriented.com>
Reviewed-by: Bryce Harrington <bryce@osg.samsung.com>
2016-04-29 16:33:01 -07:00
Benoit Gschwind
934e89a749 fbdev-backend: refactor configuration API
Implement a "well" defined API to configure the fbdev backend.
Following and according to discussion about libweston API

The output transform configuration is moved into weston and added to the
fbdev configuration structure.

Signed-off-by: Benoit Gschwind <gschwind@gnu-log.net>
[Pekka: squashed two patches and rebased.]
Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
2016-04-29 14:15:01 +03:00
Pekka Paalanen
e5b5659240 compositor-fbdev: make copy of the device string
Ensuring that the pointer to the device path stays valid gets harder and
harder with migrating to the libweston-style config handling. Therefore,
make a copy of the string, private to struct fbdev_output.

Now the pointer passed in to fbdev_output_create() could be freed right
after the call returns.

Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
Reviewed-by: Quentin Glidic <sardemff7+git@sardemff7.net>
Reviewed-by: Benoit Gschwind <gschwind@gnu-log.net>
2016-04-29 14:14:47 +03:00
Derek Foreman
c06389a105 linux-dmabuf: Keep checking planes even if the first doesn't support lseek
If we break; when lseek fails we can fail to do some legitimate tests
on remaining planes in a multi-plane buffer.

Signed-off-by: Derek Foreman <derekf@osg.samsung.com>
Reviewed-by: Daniel Stone <daniels@collabora.com>
2016-04-26 11:02:06 +03:00
Yong Bakos
425d9d9a67 man: Clarify weston.ini scale option
Add explanations of scaling that are a bit more approachable for users.

Signed-off-by: Yong Bakos <ybakos@humanoriented.com>
Fixes: https://bugs.freedesktop.org/show_bug.cgi?id=94824
Reviewed-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
2016-04-25 17:05:20 +03:00
Benoit Gschwind
bd57310c11 compositor-rdp: refactor configuration API
Implement a "well" defined API to configure the rdp backend.
Following according to discution about libweston API.

Signed-off-by: Benoit Gschwind <gschwind@gnu-log.net>
Reviewed-by: David FORT <rdp.effort@gmail.com>
[Pekka: added missing headers to Makefile.am]
Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
2016-04-25 16:36:44 +03:00
U. Artie Eoff
2dd10e0c60 clients/nested: fix undefined reference to xzalloc
Include shared/xalloc.h in clients/nested.c to fix
compilation error: undefined reference to `xzalloc'

Signed-off-by: U. Artie Eoff <ullysses.a.eoff@intel.com>
Reviewed-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
2016-04-25 13:44:09 +03:00
Quentin Glidic
9992bdcbe6 build: Add (and use) an AC_SEARCH_LIBS wrapper
AC_SEARCH_LIBS is the recommended macro for these checks, unfortunately,
we use AC_CHECK_LIB instead, and even AC_CHECK_FUNC, when only one
AC_SEARCH_LIBS would be enough.

This wrapper macro is used much like PKG_CHECK_MODULES, as it defines
(and AC_SUBST) the PREFIX_LIBS variable itself.

It also avoids adding unnecessary stuff to LIBS.

Signed-off-by: Quentin Glidic <sardemff7+git@sardemff7.net>
Tested-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Reviewed-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
2016-04-25 13:37:10 +03:00
Gustavo Zacarias
57c83f6534 build: actually use CLOCK_GETTIME_LIBS for libzunitc
The fix/check in 34d59859 is incomplete.

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Reviewed-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
2016-04-22 17:21:14 +03:00
Gustavo Zacarias
34d5985947 build: add check for clock_gettime() in librt
zuctest is another clock_gettime() user that fails to link against librt when
necessary.

Instead of adding another -lrt LDADD entry i've opted for the saner way and
converted the check to a configure test that will set CLOCK_GETTIME_LIBS
appropiately and replaced all instances of -lrt with it.
Built-tested against old and new glibc.

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Reviewed-by: Bryce Harrington <bryce@osg.samsung.com>
Reviewed-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
2016-04-22 11:13:04 +03:00
Pekka Paalanen
fd01ba055d tests: check for NULL surface in keyboard and pointer handlers
When a test destroys a wl_surface, it is still possible to get events
referring to the destroyed surface. The surface in such cases will be
NULL.

Handle NULL surface gracefully in keyboard and pointer enter/leave
handlers. Touch-down handler is already NULL-safe.

This fixes a SEGV in a test I am writing for wp_viewport.

Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
Reviewed-by: Bryce Harrington <bryce@osg.samsung.com>
2016-04-22 10:45:09 +03:00
Pekka Paalanen
13a26e02e5 weston-info: look for the right wp_presentation
Patch b00c79b587 forgot to update the
global interface name to look for. Fix it.

This makes weston-info report the presentation clock again.

Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
Reviewed-by: Bryce Harrington <bryce@osg.samsung.com>
2016-04-22 10:43:40 +03:00
Jonas Ådahl
ed6014a9e4 input: Don't try to send axis_source when there are no resources
The focus_client pointer may be NULL here if the focused client has no
pointer resources. To avoid a crash, NULL check focus client before
proceeding to send the events.

https://bugs.freedesktop.org/show_bug.cgi?id=94899

Signed-off-by: Jonas Ådahl <jadahl@gmail.com>
Reviewed-by: Mike Blumenkrantz <zmike@osg.samsung.com>
2016-04-22 10:31:28 +08:00
Jonas Ådahl
8b6c9fcd4e data-device: Update current action even if source version is old
If the version of the source object is old enough to not have
wl_data_source.set_actions() the current action would never be updated
since source->set_actions would never be set.

To fix this, instead of checking whether source->set_actions before
proceeding with updating the current action, just always update the
action when we know all parts are valid dnd data device objects.

Signed-off-by: Jonas Ådahl <jadahl@gmail.com>
Reviewed-by: Mike Blumenkrantz <zmike@osg.samsung.com>
Reviewed-by: Carlos Garnacho <carlosg@gnome.org>
2016-04-22 10:31:21 +08:00
Jonas Ådahl
10257ee5d9 desktop-shell: Get rid of some unused fields
Signed-off-by: Jonas Ådahl <jadahl@gmail.com>
Reviewed-by: Mike Blumenkrantz <zmike@osg.samsung.com>
2016-04-22 10:31:21 +08:00
Jonas Ådahl
d3a3ee980d desktop-shell: Unset the shell surface owner when it goes away
On client destruction, the shell object may be destroyed before the
shell surface objects. If this happens to two surfaces of the same
client, and one surface being destroyed results in the focus being
switched to the other, this would trigger a ping event.

The ping event sending function relies on having a valid owner, and if
the shell would be destoryed prior to the shell surface, we'd crash in
this function.

Solve this by unsetting the owner pointer when the shell client goes
away and early out in the ping event sending function if the owner is
gone.

Signed-off-by: Jonas Ådahl <jadahl@gmail.com>
Reviewed-by: Mike Blumenkrantz <zmike@osg.samsung.com>
2016-04-22 10:31:21 +08:00
Benoit Gschwind
3c53094e24 headless: port the headless backend to the new init api
refactor configuration API of headless-backend

Signed-off-by: Bryce Harrington <bryce@osg.samsung.com>
Reviewed-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>

v6:
  - Define version number in the header
  - Don't use leading underscores in header guards
  - Add stub config_init_to_defaults()
  - Allocate config on stack
  - Drop unused display_name parameter
  - Add error message when config is invalid
  - Install compositor-headless.h and list it in headless-backend sources
v5:
  - Update to current trunk
  - Fixed typo 'struct weston_wayland_backend_config'
  - Dropped unused variables
  - Dropped weston_headless_backend_config_create() in favor of
    directly zalloc'ing the object
  - Dropped weston_headless_backend_load() in favor of the more
    generalized load_backend_new().
  - Dropped typedef from header
  - Restored use of 'backend_init' entry point
  - Backend_init() takes a base weston_backend_config object
  - Renamed 'param' to 'config' in a few places for consistency
  - Renamed 'headless_options' variable to 'options for consistency
  - Version the base struct
  - Free config on error
  - Don't free config during backend_init normal operations
  - Adjust header ordering
  - Make header guard naming consistent with other headers
  - Light reformatting for code style and consistency with other
    backend config patches

Signed-off-by: Bryce Harrington <bryce@osg.samsung.com>
Reviewed-by: Giulio Camuffo <giuliocamuffo@gmail.com>
[Pekka: rebased to apply before drm and x11 backends]
[Pekka: squashed in the headless part of "Enforce destruction of all
backend config objects after initialization"]
Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
2016-04-18 14:44:39 +03:00
Bryce Harrington
98ab08bef8 main: document load_backend_new()
Split from the patch "Enforce destruction of all backend config objects
after initialization".

Signed-off-by: Bryce Harrington <bryce@osg.samsung.com>
Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
2016-04-18 14:33:04 +03:00
Bryce Harrington
6ca25b3faa Revert 'main: Remove unused function load_backend_new()'
This reverts commit 5ffbfffaf7.

Restore load_backend_new() for use with libweston backend configuration.

Signed-off-by: Bryce Harrington <bryce@osg.samsung.com>
Reviewed-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
2016-04-18 14:08:33 +03:00
Bryce Harrington
20b66c3004 compositor: Version the backend configuration structures
With this struct versioning, it is possible to add new options without
breaking the ABI, as long as all additions are made to the end of a
struct and nothing existing is modified or removed.  When things are
added, the structure's size will increase, and we'll use this size as
our minor version number.  If existing things need to be changed, then
the major version, struct_version, is incremented to indicate the ABI
break.

From our call sites in main these major and minor version will be
recorded as struct_version and struct_size.  Each backend will then
verify these against its own assumptions.  So long as the backend's
struct is equal or larger than what was passed in and the major versions
are equal, we're good; but if it is larger, then this is a fatal error.

Signed-off-by: Bryce Harrington <bryce@osg.samsung.com>

v6:
 - Document refs for alternatives/assumptions for backend configs
v5:
 - Move the header changes to a pre-requisite patch from the drm backend

Signed-off-by: Bryce Harrington <bryce@osg.samsung.com>
[Pekka: bring back the archive links Bryce looked up.]
Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
2016-04-18 13:37:41 +03:00